Interpret integers with multiple negative signs and plot them on a number line.

• Develop the concept that two negative signs produce a positive integer.
• Levels begin with positive and negative integers and progress to integers with multiple negative signs.
• Interpret negative signs as ‘the opposite of’ an integer: -2 reverses 2 on a number line. 

Find the correct number of body parts for the monster given proportional relationships based on one monster (unit rate).

• Choose the missing value given a unit rate: 2 eyes to 3 arms, 4 eyes = __ eyes.
• Apply unit rates posted as parts on one monster for multiple monsters.
• Levels start with finding the unit rate, the proportion for one monster, then progress to building a unit rate and solving proportional problems.

Represent exponential growth models (groups of circles) using exponential notation.

• Interpret the growth of a single dot (n⁰) by using repeated multiplication and exponential notation.  
• Represent four groups of objects as 4×4 or 4²
• Levels start with interpreting visual representations of exponential growth using repeated multiplication and move into exponential notation.

Estimate and model percent changes in JiJi’s height.

• Estimate the height of an object that shrinks/grows by a given percent.
• Find the percent change for an object that shrinks/grows from a start value to an end value.
• Levels start with visual puzzles that show percent change visually and progress to calculating the percent change given start and end values.